Gearing.



W. A. GREAVES.

GEARING. APPLICATION FILED MAE.6, 1909.

v Patented Dec. 5, 1911.

wltnesgas.

; UNITED STATES PATENT OFFICE.

WILLIAM ALLEN GBEAVES, OF CINCINNATI, OHIO, ASSIGNOR T0 GREAIES, KLUSMAN & (30., OF CINCINNATI, OHIO, A. QOPAB'INEBSHIP.

emanate.

Specification t-Letters Patent.

Patented Dec. 5, 1911.

To all whom itmay concern:

Be it known that I, WILLIAM A. GREAVES, a citizen of the United States, residing at Cincinnati, Ohio, have invented a new and useful Improvement in Gearing, of which the following is a specification.

My invention relates 'to gearing of'the class adapted to enginelathes or pther suitable purposes, and the objects of my improvements are to relieve-the spindle of all the usual connecting parts with the other members; to provide an independent support concentric with the spindle for said connecting parts; to provide adjustable means for regulating the mesh of tha intermediate gear with the back gear (gene; to provide means for securing the intermediate gear improper engagement with the back gear-e to prevent chattering; to provide coactingjautomatic friction clutches. for permitting the s indle to be driven in a reverse direction, an toprovide compact and durable construction and assemblage of parts for securing facility of operation and'efli- :ciency of action. These objects are attained I -in the following described manner as illustrated in the accompanying drawings, in which Figure -1 is la diagram matic view with parts in front elevation and parts in section of a gearing embodying my improvements; Fig. 2 an end elevation with parts in section on the line a--'a of Fig. 1,, Fig. 3, a front elevation of the sliding carriage with ad 'justable stops for the intermediate gear tumbler, and Fi' 4, a transverse section of an automatic friction clutch.

In the drawings, I represents the supporting frame formed with bearings 2 and 3 and with intermediate supports 4 wherein a sleeve 5 is secured. The spindle 6 pro-' vided with the usual gear 7 and journaled in bearings'2 concentric withsleeve 5 is extended therethrough without contact for preventing any binding. or' frictional contact with thesleeve by t e spindle when de-' flected laterally under the strain of heavy work. The driven pulley 8, provided with a spur gear 9, is idly mounted on the sleeve ad acent to the s indle gear 7 and is also movable longitudinally thereon by means of the usual sh fter 11. A spring actuated pin 12 on gear 7 is adapted to det-achably engage the pulley 8 therewith when desired. Spur gears 12 and 13 mounted to turn on sleeve 5 may be automatically secured to turn together by means of the frictionclutch 14 (shown 1n Fig. 4). A tumbler 15 provided with shafts 16 and 17 is rotatively adjust ableon sleeve 5 by means of the worm and gearconnection 18 therewith and withthe stationary hood 1 9. Shaft 16 carries spur gears 21 and 22 and shaft '17 is provided on one end with a spur gear 23 in continuous engagement w th gear 21 and on the other end with gear 24 in continuous engagement with gear 12. The back gear shaft 25 journaled in bearings 3 in the usual manner is provided with a inion 27 adapted to en-. gage with the splndle gear 7 and with an idle gear 28 adapted to engage with gear 13. A friction clutch 29 similar to, but the reverse of clutch 14 serves to automatically engage gear 28 to turn with theshaft25. A cone of gears 31 splined on shaft-25 is longitudinally adjustable thereon by means of a shifter 32 which is formed with a .toothed rack 33 and slidably mduiited in the supporting frame 1. A shaft 34 journaled in the frame is provided on one end with a pinion 35 in engagement with said rack and on the other end with a crank arn; 36 wlfich 4 carries a spring plunger 37. A disk 38 formed on the supporting frame is provided with holes 39 for the engagement therewith of the plunger 37 Said holes correspond with the respective cone gears 31 and serve to lock the shifter with said respective gears successively in the proper position to be engaged with gear 22 on the tumbler 15. A series of stops 41 corresponding to the respective gears 31 are adjustably secured on the sliding shifter 32 for intercepting the tumbler at predetermined different points in its movement for properly engaging the gear22 with either of the-gears 31 for driving the spindle at different speeds. In the friction clutch shown in Fi 4 the friction ring 42 is expanded into frictional engagement with the wall 43 by means of theman angle to the radius passing1 therethrough when the shaft is turned in t the arrow. When the direction of the shaft is reversed, the dog resumes a radial posi- :tion as shown, and thereby releases the frictional engagement of ring 42 with wall 43.

In. operation, the spindle may be driven directly. by the engagement of the pulley with the spindle gear, as shown in 1.

c direction of v tomatie movement of the pivoted dog 44 at By sliding the pulley on'the sleeve out of engagement with the spindle gear and with the gear 9 thereon into engagement with gear 23, motion is communicated to the spindle gear through shaft l7, gear 24c, gear 12, clutch l4, gear 13, gear 28', clutch 29, shaft -25, and pinion 27. By continuing the engagement of gear 9 with gear 23 and adjusting the tumbler in contact with the proper stop 41 with gear 22 into engagement with the corresponding gear of cone gears 31, motion may be communicated to the spindle gear through shaft 25 and pinion 27. The engagement of gear 22 with either of the gears 31 drives shaft 25 at a greater nections between them, a cone of gears" splined on the shaft, a' tumbler adjustable in an arc concentric with the spindle, a driven tumbler gear thereon for separately engaging with any of the cone gears, and automatic clutch and gear connect-ions from the tumbler gearwith the shaft.

2. A gearing comprising a spindle, a tumbler supported independently of and concentric therewith, means for moving and maintaining the tumbler in predetermined rotative positions in relation to the spindle,

and driven change gear connections between speeds therefrom through the tumbler agear the tumbler and the spindle.

3. A gearing comprising a spindle, a sleeve independently supported concentric therewith, a tumbler rotatively adjustable on the sleeve, a tumbler gear, a driven gear mounted to'turn on the sleeve and arranged to detachably engage with the tumbler gear, detachable connections from said driven gear with the spindle, and change speed gear connections from the tumbler gear with the spindle, whereby the spindle may be driven in unison with the driven gear or at different and its connections with the spindle ternately.

4. A gearing comprising a support, aspindle and a shaft-journaled therein, gear connection between them, a driving gear, change speed gear connection therefrom with the shaft, and' automatic clutch and gear connection from the driving gear'with the shaft. v

5. In a gearing, the combination of a spindle gear, a back ear shaft provided with a pinion detacha ly engaging therewith, a driven gear, and gear and automatic clutch mechanism engaging the back shaft therewith. a 6. A gearing comprising a spindle, aspindle gear, a tumbler rotatively adjustable a pinion thereon engaging with the spindle gear, and a cone of gears splined on said shaft of a tumbler concentric with the spindle, a gear thereon adapted to detachably engage with the respective cone gears and driven connections adapted to alternately engage with the spindle gear and the tumbler-gear. v

8. A gearing comprising a back shaft, a

cone of change gears splined thereon, a sliding shifter for the cone, adjustable stops thereon corresponding to the respective gears ofthe cone, a tumbler pivotally mounted at a fixed point and arranged to engage with either of the stops, and a driven gear carried by the tumbler and adapted to engage with the corresponding gear of the cone.

9. A gearing comprising a back shaft, a cone of gears splined thereon, a shifter for the cone, stops thereon corresponding to the respective gears of the cone, means for moving and maintaining the shifter with the cone and the stops in predetermined relative positions, a live spindle a tumbler rotatively adjustable in relation thereto for contacting with either of the stops, and a gear thereon arranged to detachably engage with the correspor ding gear of the cone. t

10. In a gearing, the combination of a spindle, a spindle gear, a back gear shaft, a pinion thereon engaging with the spindle gear, a cone of gears splined on said shaft, a'tumbler, a tumbler gear movable thereby into engagement with either of the cone gears, automatic clutch connections between said tumbler gear and shaft, and driven con-. nections adapted to alternately engage with the tumbler gear and spindle gear. 

